diff --git a/packages/core/src/__integrationtests__/Attestation.spec.ts b/packages/core/src/__integrationtests__/Attestation.spec.ts
index 000c9864aa..7591bc175c 100644
--- a/packages/core/src/__integrationtests__/Attestation.spec.ts
+++ b/packages/core/src/__integrationtests__/Attestation.spec.ts
@@ -8,14 +8,12 @@ import { IAttestedClaim, IClaim } from '..'
 import Attestation from '../attestation/Attestation'
 import { revoke } from '../attestation/Attestation.chain'
 import AttestedClaim from '../attestedclaim/AttestedClaim'
-import { IBlockchainApi } from '../blockchain/Blockchain'
 import {
   IS_IN_BLOCK,
   IS_READY,
   submitTxWithReSign,
 } from '../blockchain/Blockchain.utils'
-import { configuration } from '../config/ConfigService'
-import getCached from '../blockchainApiConnection'
+import { config, disconnect } from '../kilt'
 import Claim from '../claim/Claim'
 import Credential from '../credential/Credential'
 import CType from '../ctype/CType'
@@ -35,10 +33,9 @@ import {
   WS_ADDRESS,
 } from './utils'
 
-let blockchain: IBlockchainApi | undefined
 let alice: Identity
 beforeAll(async () => {
-  blockchain = await getCached((configuration.host = WS_ADDRESS))
+  config({ address: WS_ADDRESS })
   alice = await Identity.buildFromURI('//Alice')
 })
 
@@ -357,5 +354,5 @@ describe('When there is an attester, claimer and ctype drivers license', () => {
 })
 
 afterAll(() => {
-  if (typeof blockchain !== 'undefined') blockchain.api.disconnect()
+  disconnect()
 })
diff --git a/packages/core/src/__integrationtests__/AttestationPE.spec.ts b/packages/core/src/__integrationtests__/AttestationPE.spec.ts
index 4d4a342b5b..a3f5c5e2e4 100644
--- a/packages/core/src/__integrationtests__/AttestationPE.spec.ts
+++ b/packages/core/src/__integrationtests__/AttestationPE.spec.ts
@@ -8,21 +8,19 @@ import {
   Accumulator,
   AttesterAttestationSession,
 } from '@kiltprotocol/portablegabi'
-import { Claim, IBlockchainApi, IClaim, Message } from '..'
+import { Claim, IClaim, Message } from '..'
 import { Attester, Claimer, Verifier } from '../actor'
 import { ClaimerAttestationSession } from '../actor/Claimer'
 import { IS_IN_BLOCK, submitTxWithReSign } from '../blockchain/Blockchain.utils'
-import { configuration } from '../config/ConfigService'
-import getCached from '../blockchainApiConnection'
+import { config, disconnect } from '../kilt'
 import Credential from '../credential'
 import Identity, { AttesterIdentity } from '../identity'
 import constants from '../test/constants'
 import { IRevocationHandle } from '../types/Attestation'
 import { CtypeOnChain, DriversLicense, FaucetSeed, WS_ADDRESS } from './utils'
 
-let blockchain: IBlockchainApi | undefined
 beforeAll(async () => {
-  blockchain = await getCached((configuration.host = WS_ADDRESS))
+  config({ address: WS_ADDRESS })
 })
 
 describe('Privacy enhanced claim, attestation, verification process', () => {
@@ -315,5 +313,5 @@ describe('Privacy enhanced claim, attestation, verification process', () => {
 })
 
 afterAll(() => {
-  if (typeof blockchain !== 'undefined') blockchain.api.disconnect()
+  disconnect()
 })
diff --git a/packages/core/src/__integrationtests__/Balance.spec.ts b/packages/core/src/__integrationtests__/Balance.spec.ts
index 4c69042afc..652c332858 100644
--- a/packages/core/src/__integrationtests__/Balance.spec.ts
+++ b/packages/core/src/__integrationtests__/Balance.spec.ts
@@ -10,14 +10,12 @@ import {
   listenToBalanceChanges,
   makeTransfer,
 } from '../balance/Balance.chain'
-import { IBlockchainApi } from '../blockchain/Blockchain'
 import {
   IS_IN_BLOCK,
   IS_READY,
   submitTxWithReSign,
 } from '../blockchain/Blockchain.utils'
-import { configuration } from '../config/ConfigService'
-import getCached from '../blockchainApiConnection'
+import { config, disconnect } from '../kilt'
 import Identity from '../identity/Identity'
 import {
   MIN_TRANSACTION,
@@ -27,9 +25,8 @@ import {
   WS_ADDRESS,
 } from './utils'
 
-let blockchain: IBlockchainApi | undefined
 beforeAll(async () => {
-  blockchain = await getCached((configuration.host = WS_ADDRESS))
+  config({ address: WS_ADDRESS })
 })
 
 describe('when there is a dev chain with a faucet', () => {
@@ -182,5 +179,5 @@ describe('When there are haves and have-nots', () => {
 })
 
 afterAll(() => {
-  if (typeof blockchain !== 'undefined') blockchain.api.disconnect()
+  disconnect()
 })
diff --git a/packages/core/src/__integrationtests__/ChainConnectivity.spec.ts b/packages/core/src/__integrationtests__/ChainConnectivity.spec.ts
index bc5a4db12c..f6814e3432 100644
--- a/packages/core/src/__integrationtests__/ChainConnectivity.spec.ts
+++ b/packages/core/src/__integrationtests__/ChainConnectivity.spec.ts
@@ -6,18 +6,17 @@
  */
 
 import { Header } from '@polkadot/types/interfaces/types'
-import { IBlockchainApi } from '../blockchain/Blockchain'
-import { getCached } from '../blockchainApiConnection'
-import { configuration } from '../config/ConfigService'
 import { WS_ADDRESS } from './utils'
+import { config, disconnect } from '../kilt'
+import { getCached } from '../blockchainApiConnection'
 
-let blockchain: IBlockchainApi | undefined
 beforeAll(async () => {
-  blockchain = await getCached((configuration.host = WS_ADDRESS))
+  config({ address: WS_ADDRESS })
 })
 
 describe('Blockchain', () => {
   it('should get stats', async () => {
+    const blockchain = await getCached()
     expect(blockchain).not.toBeUndefined()
     const stats = await blockchain!.getStats()
 
@@ -29,6 +28,7 @@ describe('Blockchain', () => {
   })
 
   it('should listen to blocks', async (done) => {
+    const blockchain = await getCached()
     const listener = (header: Header): void => {
       // console.log(`Best block number ${header.number}`)
       expect(Number(header.number)).toBeGreaterThanOrEqual(0)
@@ -42,5 +42,5 @@ describe('Blockchain', () => {
 })
 
 afterAll(() => {
-  if (typeof blockchain !== 'undefined') blockchain.api.disconnect()
+  disconnect()
 })
diff --git a/packages/core/src/__integrationtests__/Ctypes.spec.ts b/packages/core/src/__integrationtests__/Ctypes.spec.ts
index 37afdb101d..a4e2e9ccb3 100644
--- a/packages/core/src/__integrationtests__/Ctypes.spec.ts
+++ b/packages/core/src/__integrationtests__/Ctypes.spec.ts
@@ -5,19 +5,16 @@
  */
 
 import { Identity } from '..'
-import { IBlockchainApi } from '../blockchain/Blockchain'
 import { IS_IN_BLOCK, submitTxWithReSign } from '../blockchain/Blockchain.utils'
-import { configuration } from '../config/ConfigService'
-import getCached from '../blockchainApiConnection'
 import CType from '../ctype/CType'
 import { getOwner } from '../ctype/CType.chain'
 import { ERROR_CTYPE_ALREADY_EXISTS } from '../errorhandling/ExtrinsicError'
 import ICType from '../types/CType'
+import { config, disconnect } from '../kilt'
 import { wannabeFaucet, WS_ADDRESS } from './utils'
 
-let blockchain: IBlockchainApi | undefined
 beforeAll(async () => {
-  blockchain = await getCached((configuration.host = WS_ADDRESS))
+  config({ address: WS_ADDRESS })
 })
 
 describe('When there is an CtypeCreator and a verifier', () => {
@@ -123,5 +120,5 @@ describe('When there is an CtypeCreator and a verifier', () => {
 })
 
 afterAll(() => {
-  if (typeof blockchain !== 'undefined') blockchain.api.disconnect()
+  disconnect()
 })
diff --git a/packages/core/src/__integrationtests__/Delegation.spec.ts b/packages/core/src/__integrationtests__/Delegation.spec.ts
index 78b6164597..19a24ef4d4 100644
--- a/packages/core/src/__integrationtests__/Delegation.spec.ts
+++ b/packages/core/src/__integrationtests__/Delegation.spec.ts
@@ -7,14 +7,12 @@
 import { cryptoWaitReady } from '@polkadot/util-crypto'
 import { Identity } from '..'
 import Attestation from '../attestation/Attestation'
-import { IBlockchainApi } from '../blockchain/Blockchain'
 import {
   IS_IN_BLOCK,
   IS_READY,
   submitTxWithReSign,
 } from '../blockchain/Blockchain.utils'
-import { configuration } from '../config/ConfigService'
-import getCached from '../blockchainApiConnection'
+import { config, disconnect } from '../kilt'
 import Claim from '../claim/Claim'
 import Credential from '../credential/Credential'
 import {
@@ -37,9 +35,8 @@ import {
   WS_ADDRESS,
 } from './utils'
 
-let blockchain: IBlockchainApi | undefined
 beforeAll(async () => {
-  blockchain = await getCached((configuration.host = WS_ADDRESS))
+  config({ address: WS_ADDRESS })
 })
 
 describe('when there is an account hierarchy', () => {
@@ -197,5 +194,5 @@ describe('handling queries to data not on chain', () => {
 })
 
 afterAll(() => {
-  if (typeof blockchain !== 'undefined') blockchain.api.disconnect()
+  disconnect()
 })
diff --git a/packages/core/src/__integrationtests__/Did.spec.ts b/packages/core/src/__integrationtests__/Did.spec.ts
index 18068f1178..7b740a55ae 100644
--- a/packages/core/src/__integrationtests__/Did.spec.ts
+++ b/packages/core/src/__integrationtests__/Did.spec.ts
@@ -5,15 +5,12 @@
  */
 
 import { Did, Identity } from '..'
-import { IBlockchainApi } from '../blockchain/Blockchain'
-import getCached from '../blockchainApiConnection'
-import { configuration } from '../config/ConfigService'
 import { queryByAddress, queryByIdentifier } from '../did/Did.chain'
 import { WS_ADDRESS } from './utils'
+import { config, disconnect } from '../kilt'
 
-let blockchain: IBlockchainApi | undefined
 beforeAll(async () => {
-  blockchain = await getCached((configuration.host = WS_ADDRESS))
+  config({ address: WS_ADDRESS })
 })
 
 describe('querying DIDs that do not exist', () => {
@@ -35,5 +32,5 @@ describe('querying DIDs that do not exist', () => {
 })
 
 afterAll(() => {
-  if (typeof blockchain !== 'undefined') blockchain.api.disconnect()
+  disconnect()
 })
diff --git a/packages/core/src/__integrationtests__/ErrorHandler.spec.ts b/packages/core/src/__integrationtests__/ErrorHandler.spec.ts
index 1bbf670686..3bea81740d 100644
--- a/packages/core/src/__integrationtests__/ErrorHandler.spec.ts
+++ b/packages/core/src/__integrationtests__/ErrorHandler.spec.ts
@@ -5,20 +5,18 @@
  */
 
 import BN from 'bn.js'
-import { Attestation, IBlockchainApi } from '..'
+import { Attestation } from '..'
 import { makeTransfer } from '../balance/Balance.chain'
 import { IS_IN_BLOCK, submitTxWithReSign } from '../blockchain/Blockchain.utils'
-import { configuration } from '../config/ConfigService'
-import getCached from '../blockchainApiConnection'
 import { ERROR_CTYPE_NOT_FOUND, ERROR_UNKNOWN } from '../errorhandling'
 import Identity from '../identity'
+import { config, disconnect } from '../kilt'
 import { WS_ADDRESS } from './utils'
 
-let blockchain: IBlockchainApi | undefined
 let alice: Identity
 
 beforeAll(async () => {
-  blockchain = await getCached((configuration.host = WS_ADDRESS))
+  config({ address: WS_ADDRESS })
   alice = await Identity.buildFromURI('//Alice')
 })
 
@@ -48,5 +46,5 @@ it('records an extrinsic error when ctype does not exist', async () => {
 }, 30_000)
 
 afterAll(() => {
-  if (typeof blockchain !== 'undefined') blockchain.api.disconnect()
+  disconnect()
 })
diff --git a/packages/core/src/blockchain/Blockchain.ts b/packages/core/src/blockchain/Blockchain.ts
index 4215192a2a..a973f158d1 100644
--- a/packages/core/src/blockchain/Blockchain.ts
+++ b/packages/core/src/blockchain/Blockchain.ts
@@ -9,6 +9,7 @@
  */
 
 import * as gabi from '@kiltprotocol/portablegabi'
+import { PgabiModName } from '@kiltprotocol/portablegabi/build/types/Chain'
 import { ApiPromise, SubmittableResult } from '@polkadot/api'
 import { SubmittableExtrinsic } from '@polkadot/api/promise/types'
 import { Header } from '@polkadot/types/interfaces/types'
@@ -76,7 +77,10 @@ export default class Blockchain implements IBlockchainApi {
 
   public constructor(api: ApiPromise) {
     this.api = api
-    this.portablegabi = new gabi.Blockchain('portablegabi', this.api as any)
+    this.portablegabi = new gabi.Blockchain(
+      'portablegabi',
+      this.api as ApiPromise & gabi.IPortablegabiApi<PgabiModName>
+    )
     this.accountNonces = new Map<Identity['address'], BN>()
   }